Pyroclastic rock, environs of the Galán volcano, Altiplano of Catamarca, Argentina

Rock formations known as "Las Señoritas" (The Young Ladies), Jujuy, Argentina

Rock formations known as "Las Señoritas" (The Young Ladies), Jujuy, Argentina

Lava flow, near Antofagasta de la Sierra, on the Altiplano (Puna) of Catamarca, Argentina

Rock formation in the 'Quebrada de Cafayate' valley, Argentina

Rock formations of the 'Quebrada de Cafayate' valley, Argentina

The "Los Castillos" rock formation, in the "Quebrada de Cafayate" valley, province of Salta, Argentina

Sedimentrary rocks in the 'Quebrada de Flechas', on the road between Cafayate and Cachi, province of Salta, Argentina

The 'Quebrada de Flechas', in the Calchaquí valley, province of Salta, Argentina

The "Quebrada del Toro" valley, province of Salta, Argentina

A salt flat, on the Andean Altiplano (Puna), Argentina

Night on the Olaroz Salar, province of Jujuy, on the Andean Altiplano, Argentina

The Tolar Grande salt flat, on the Altiplano (Puna) of Salta, Argentina

Water 'eye' on the Tolar Grande salt flat, on the Altiplano (Puna) of Salta, Argentina

The "Salinas Grandes" salt flat, province of Jujuy, on the Andean Altiplano, Argentina

A salt cave, in a paleo-salar, near Tolar Grande, on the Altiplano (Puna) of Salta, Argentina